Valve-grinder



E. M. HUSTON.

VALVE GRINDEIL.

APPLICATION men 001.22. 1919.

Patented June 1, 1920.

2 SHEETS-:SHEET 1- "UNITED STATES PATENT OFFICE.

EDWARD 1VL HUSTON, 0F PHILADELPHIA, PENNSYLYANIA.

VALVE- RINDER.

Specification of Letters Patent. Patented J 1 1920 Application filed October 22, 1919. Serial No. 332,430.

To all whom it may concern Be it known that I, EDWARD M. HUs'roN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvementsin Valve-Grinders, of which the following is a specification.

My invention relates to new and useful improvements in valve grinders, and has for its object to provide a device of this character whereby the valve seat in the valve housing and the valve itself may be easily and quickly ground simultaneously so that said valve will absolutely fit upon the seat to make a positive closure for the intake exhaust of internal combustion engines and the like.

A further object of the invention is to provide in a device of this character means for intermittently removing the valve from its seat during the rotation thereof so as to change the position of the grinding compound relative to the'seat and valve and to give an arcuate grinding motion rather than a continuous circular motion thus preventing the valve or its seat having ridges or grooves after the grinding has been accomplished.

A further object of the invention is to provide means for adjusting the valve housing in the device so as to regulate the outward throw of the valve during the grinding operation. 7

WVith these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains mayu'nderstand how to make and use the same, I will describe its construction in detail, referring by numerals to the accompanying drawings forming a part of this application, in which Figure 1, is a side elevation 'ofmy improved valve grinder.

'Fig. 2, is an end view thereof.

Fig. 3, is a longitudinal sectional view Fig. 6, is a longitudinal sectional view thereof portions being shown in elevation.

Fig. 7, is a face view of the cam for intermittently moving the valve outward or 08 cillating the same, and

F 1g; 8, is a side elevation thereof. j 7

In carrying out my invention as here em- 7 bodied, 2' represents a'suitableframe or support preferably rectangular in cross section so thatthe device may be readily placed and securely held in a vise or similar object and .ing device which is threaded through the bearing 6 similar to the screw 9. Passing through the bearing ring 10 and the cam 8 is an Operating spindle 12 around'which is this support comprisesa base member 3havcoiled a spring 13 within the bearing. 6 one 7 end thereof resting against the bearing ring 1001' washers 14 which are placed upon the spindle to change the tension ofsaid spring and the other end resting against the washer 15 upon the operating spindle and positioned by a pin 16 passing throughsaid spindle so thatsaid spring normally draws the spindle inward. Adjacent the pin 16 is another pin 17 which acts as a shaft or axle for the cam rollers 18 the latter engaging the cam face of the cam 8 to reduce the friction incident to revolving the operating spindle, said spindle being revolved .by asuitable handle '19 attached to the outer end of the spindle in any suitable, well known or approved manner.

WVith the inner end of the operating spindle is formed a head 20 having a chamber 21 therein for the reception of a valve stem and akey hole 22 for a purpose to be hereinafter'described, and in said chamber is located a coil spring 23. A

WVith the arm or bracket- 5 is integrally formed a. chuck 24 having a bore of two different diameters forming a valve housing chamber 25 and a threaded adjusting spud hole 26 and in this hole is screwed the threaded adjusting spud 27 having a bore 28 therethrough and preferably providedon aportion of its outer face a knurled portion whereby it may bereadily screwed in or out.

In the chuck is also threaded a locking screw 29 preferably having a butterfly head so that it may be readily screwed in or out by hand and this screw enters the valve housing chamber so as to engage w1th the valve housing when placed in the chuck and lock the same against movement.

* The reference numeral 30, represents a valve housing which'is placed in the chuck and if of the proper size snugly fits said chuck which for convenience of illustrating my invention I have shown a small size valve housing with a tubular filler 31 placed in the chuck and in which the valve housing fits, said filler31- having a hole 32 therethrough for the passage of the screw 29 so that said screw can engage the housing to holdthe same in place.

The valve housing 30 has a valve stem guide 33 formed therewith and provlded fwith two different diameters producing a shoulder 34 adapted to be engaged by the inner end of the adjusting spud 27 with the smaller diameter of said guide entering the borev2'8by screwing the adjusting spud 27 in or out the position of the valve housing in the chuck may be changed.

' A valve 35 is placed in the valve housing and with its stem 36 passing through the guide 33 and the bore 28 of the adjusting spud so that the end of said valve stem projects beyond the adjusting'spud and enters the chamber 21 in the head 20 of the operating spindle, and said valve stem having a key slot 37 which'alines With the key hole 22 the two being held together by the valve key. 38 which is regularly used with the housing and the valve placed in position so "that the end of its stem enters the chamber 21 and engages the springr23 which will be compressed as the key slot 37 is brought into alinement with the key hole .22 for the insertion of'the key 38, said spring exerting sufficient pressure against the valve to prevent the accidental displacement of the key.

After'the valve is keyed to the operating spindle saidop'erating spindleis actuated 'flHltlltWO of the high points of the cam engage thecam rollerslS thus forcing the valve outwi rd to its greatest extent after which the valve housing may be adjusted by "screwing the adjusting spud 27 in or out until the desired space is obtained between the -valveand valve seat of the valve housing then the screw 29 is threaded inward until -it'eng'ages the valve housing for holding the latter in its adjustment. 1

The parts being properly adjusted a grinding compound is placed between the valve and its seat and the handle 19 revolved valve to be likewise through the medium of the operating spindle 12 and the tension of the spring will firmly hold the valve against itsseat during the grinding operation, but in order to change the position of the particles of the grinding compound relative to the valve and its seat so as not to produce ridges or grooves said valve will be'elevated from its seat each time the cam rollers 18 ride upward and over the high points of the cam 8 and after passing said high points will suddenly project into the low points thus bringing the valve suddenly against its seat bythe action of the spring 13 thus producing a compound curved grinding action in stead of'the ordinary circular grinding action, I Y

Of course I do not wish to be limited to the exact details of construction as herein 7 shown as these may be varied within the limits of the appended claims without derollers journaledon said pin and engaging the cam, means for actuating said spindle, a'

head carried by said spindle provided with means whereby the stem of a valve may be attached thereto, a chuck carried by another,

portion of the frame and having a chamber for the reception of a valve housing and means for adjusting the position of a valve housing therein, and means for holding the valve housing in its adjusted position.

2. In a device of the character stated a chuck having a bore therethroughlof two different diametersthe smaller section being .threaded, said bore adapted to receive a valvehousing with its valve, a tubular filler for taking up any lost space between the -valve housing and chuck, an adjusting spud screwed in the smaller section of the bore and engaging a portion of the valve hous- .ing to adjust the same,anda screw threaded through the chuck and engaging the valve housing to hold the same in its adjustment,

3. A' valve grinder comprising a frame rectangular in'cross section and adapted to be placed in a vise, said frame comprising a bore and two upright arms or brackets, a chuck formed integral with one of said brackets provided with a valve housing chamber for receiving a valve housing and a threaded adjusting spud opening, an adjusting spud screwed in said opening and engaging a portion of the valve housing to adjust the same within the chuck, a holding or locking screw threaded through the chuck engaging the valve housing to hold the latter in its adjusted position, a bearing formed integral with the other bracket or arm, said bearing having a central longitudinal bore, a bearing ring located in the inner end of said bore, a screw for holding said ring in place, a cam located in the outer end of said bore, a screw for holding said cam in place, an operating spindle passing through the bearing ring cam and journaled therein, a pin passing through the spindle, a washer in said spindle engaging the pin and spring coiled about said spindle with one end in engagement with the bearing ring as the stationary member or other ring are in engagement with the washer as the movable member and other pin pass through the spindle, cam rollers on the last named pin engaging the cam, a handle carried by the spindle for operating the same, a head carried by said spindle, said head having a chamber therein provided with a key hole, said chamber adapted to register with the end of a valve stem carried by the valve housing, said valve stem being attached to the spindle head by a key which passes through the key hole and the valve stem, the spring within the chamber in said head for exerting pressure against the valve stem to prevent the accidental displacement of the key.

In testimony whereof I have hereunto affixed my signature.

EDWARD M. HUSTON. 

